



You state that your scaffold extensions have rungs spaced 16 inches apart and that when using them, the only way of attaching guardrails is to the rungs. For all scaffolds, the maximum height is 45 inches. The minimum guardrail height for scaffolds manufactured or first placed in service after Januis 38 inches. Question (1): Under §1926.451(g)(4)(ii), the minimum height for scaffold guardrails manufactured and first placed in service before January 1, 2000, is 36 inches. We apologize for the extended delay in providing this response. Unfortunately, we misplaced your letter and failed to recognize our error in a timely manner. This is in response to your letter dated August 15, 1997, addressed to the Occupational Safety and Health Administration's (OSHA) Denver Regional Office in which you asked several questions regarding 29 C.F.R.
